Hello All!

My wife and I are planning a quick 5-6 day vacation to Scotland for our anniversary. We are going to use United miles to get over there in business class but had a quick question about lounge access. Here are my two options:

1) IAD - LHR - with this I know we would get Polaris Lounge access at IAD and arrival lounge access at LHR

2) IAD - EDI w/ layover in FRA: the IAD-FRA is on United metal. THe FRA - EDI is on Luftshana metal. I know we would still get Polaris lounge access at IAD but would we get Luftshana business class lounge access on our 2 ish hour layover at FRA?

I know its an extra 6k miles pp but we are leaning towards option 2 as it gets us to EDI right away as opposed to having to then take train from London to Edinburgh